
Boonville and Philo anchor the Anderson Valley in this late-1950s survey of the California Coast Ranges. The landscape is defined by the steep ridges of the North Fork Navarro River and the Masonite Industrial Road, a dedicated heavy-haul timber route winding through the backcountry toward Orrs Springs. This network of private and public roads supported a robust logging economy, evidenced by operations like the Philbrick Mill near Lazy Creek.
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